According to Instagram

I first questioned why two billion cats have Instagram accounts, then realized there can't be 2 billion Egyptian Maus in all the world, much less on Instagram.

Maus?

2 billion is only a quarter of 8 billion. They are the weird ones.

I’m fine with being weird, my beef is the presumption that everyone has Instagram.

How many of those are bots or alts?

We are the 72%. They're the weird ones.

Sure, two billion is a lot, but that is still only a third of all living adults.